| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361189000 | Plural switches in control circuit | 16 |
| 20080266743 | LIGHTING CONTROL SYSTEM - A lighting control system comprises a plurality of toggle switches, a plurality of pushbuttons, a plurality of timer circuits, a plurality of relays, and a plurality of photocells to control a first plurality of lights, a second plurality of lights, a third plurality of lights and a fourth plurality of lights. The toggle switches and pushbuttons either control the lights directly or activate the timers to control the lights. The relays may be energized to switch on the lights. The photocells may be used to control the lights that are located in an outside setting. | 10-30-2008 |
| 20090284891 | LOW POWER SOLENOID CONTROL SYSTEM AND METHOD - A low power solenoid control circuit including a power source in series with a sensing element and a first diode, an inductor to actuate a valve, an energy storage device to store and discharge energy into the inductor, diodes to control current flow, and switches and a controller to control the circuit. The circuit may be operated by closing a first switch, thereby allowing a source current to flow through an inductor; opening the first switch, thereby forcing a charge current to flow through an energy storage device utilizing the inductance of the inductor; repeating these steps until the energy storage device is sufficiently charged; and upon command, closing a second switch, thereby forcing a discharge current to flow from the energy storage device to the inductor causing the inductor to produce an actuating magnetic field thereby actuating a mechanical valve. | 11-19-2009 |
| 20100149718 | SYSTEM AND METHOD FOR CONTROLLING A SET OF BI-STABLE SOLENOIDS FOR ELECTROMAGNETIC LOCKING SYSTEMS - A system and a method for controlling a set of bi-stable solenoids for locking applications which eliminates the direct connection of the power supply and solenoid by introducing a capacitor and a switch between the power supply and solenoid, thus eliminating the need of a dedicated h-bridge for every solenoid, and reducing the control lines required for each solenoid such that after the initial control lines, every subsequent solenoid requires only one control line to select the appropriate solenoid. | 06-17-2010 |
| 20120320490 | Relay Control Circuit - A relay control circuit is disclosed. In one aspect, the relay control circuit is a hybrid of a double winding relay control scheme and a single winding relay control scheme. | 12-20-2012 |
| 361190000 | Including electronic switch | 12 |
| 20090073628 | SAFETY SWITCHING APPARATUS - A safety switching apparatus for the failsafe disconnection of an electrical load has a first and a second terminal for supplying a first and a second signal from a signaling device, such as an emergency-off button. The safety switching apparatus also has a first and a second switching element which together produce a redundant output switching signal for disconnecting the load. The first switching element has a first control circuit to which the first signal is supplied. The second switching element has a second control circuit to which the second signal is supplied. The safety switching apparatus further has circuitry providing a first current path, an alternative second current path and at least one further switching element. The at least one further switching element is designed to select either the first or the second current path, depending on a polarity of the second signal, in order to route the second signal to the second control circuit. | 03-19-2009 |
| 20110075315 | ECONOMIZER FOR VEHICLE BATTERY DISCONNECT - An economizer configured to connected coils in series and in parallel with a voltage source in order to facilitate pulling relays to a closed position, and thereafter, holding the relays in the closed position while reducing a voltage applied across the coils. | 03-31-2011 |
| 20120026640 | MODULAR CIRCUIT CONFIGURATION FOR SWITCHING ELECTRICAL POWER AND AN ADAPTER DESIGNED TO THIS END - A modular circuit arrangement for switching electrical power includes a relay socket, an adapter and a relay. The adapter is detachably connectable to the relay socket and includes a semiconductor relay and a control unit electrically connected to the semiconductor relay. The relay includes a mechanical switch and is electrically and mechanically detachably connectable to the adapter so as to connect the semiconductor relay of the adapter in parallel to the mechanical switch. The control unit is configured to actuate the relay and the semiconductor switch at different times. | 02-02-2012 |
| 20130027832 | Method and Apparatus for Isolating High Voltage Power Control Elements - The devices and methods described below provide for a high voltage control circuits using commercial lower voltage, and lower cost, relays. A low voltage control system using commercial switching relays is used to control and switch an isolated low voltage power supply through an isolation layer. The isolated low voltage power supply is used to drive commercial switching relays that control the high voltage power applied to the high voltage load. Adding the isolated low voltage power supply controlled through an isolation layer enables the use of commercial low voltage components to switch high voltage power such as 347VAC without violating Underwriters Laboratories spacing or testing requirements. | 01-31-2013 |
| 20130279061 | DRIVE CIRCUIT FOR AN ELECTROMAGNETIC RELAY - A drive circuit for an electromagnetic relay having a relay coil and switch contacts, includes a first switching device between a first coil terminal and a first voltage source, a second switching device between a second coil terminal and a zero potential, and a control device producing a current through the coil closing both switching devices. To provide the shortest possible response time and simple and cost-effective construction, a second voltage source is connected through a third switching device to the first coil terminal. The third switching device is connected in parallel with the first switching device, the second voltage source has a higher voltage level than the first voltage source and the control device produces a current through the coil, initially closing all three switching devices and following expiration of a predefined period, opening the third switching device again and keep the first and second switching devices closed. | 10-24-2013 |
| 20140211363 | METHODS AND APPARATUS FOR IMPROVED LATCHING RELAY DRIVER - Methods and apparatus provide for at least one relay with contacts transitioning from: an OFF state to an ON state in response to an ON-pulse of current through a coil in a first direction; and the ON state to the OFF state in response to an OFF-pulse of current through the coil in a second, opposite direction. A driver circuit operates to produce the ON-pulse through the coil of the relay in response to a control signal commanding the ON-state of the contacts; produce the OFF-pulse of current through the coil of the relay in response to a control signal commanding the OFF-state of the contacts; and produce the OFF-pulse of current through the coil of the relay in response to a loss of operating potential across the pair of operating power nodes. | 07-31-2014 |
| 20150022933 | Device for Controling Electrically Actuable Valves in Different Operating Modes - A device for controlling an electrically actuable valve having a valve coil, including a main switch, situated in the current circuit of the valve coil, for adjusting the current flowing through the valve coil, and a freewheeling path, which has a freewheeling diode and is switched in parallel with the valve coil. A freewheeling switch is provided, by which the freewheeling path is able to be interrupted or closed. This allows for optionally operating the valve in a PMW or in a switching operation. | 01-22-2015 |
| 20150055271 | AC Line Powered Relay Driving Circuits - Disclosed are exemplary embodiments of relay drive circuits. In an exemplary embodiment, a relay drive circuit generally includes a first diode, a second diode, a third diode, a first transistor, a second transistor, a first capacitor, and a second capacitor. The relay drive circuit is operable to transform an AC voltage to a DC voltage, and then use the DC voltage to control on/off of the relay. | 02-26-2015 |
| 20150340143 | Independent Control of Two Solenoid Operated Valves over two wires in an Irrigation System | 11-26-2015 |
| 20150371748 | ELECTROMAGNETIC OPERATING DEVICE - In the electromagnetic operating device, the driving power supply is composed of two types of power supplies: a capacitor power supply serving as a power supply which is for performing opening/closing operation in a normal time with respect to the vacuum valve; and a DC power supply which is for performing opening/closing operation in an emergency. The capacitor power supply which is for performing opening/closing operation in the normal time includes: capacitors that store electric power to be supplied to the electromagnetic coil; and a control board which controls a current to be supplied from the capacitors to the electromagnetic coil in response to an open-contact or close-contact command to the vacuum valve. Then, the DC power supply which is for performing opening/closing operation in the emergency is to directly supply DC electric power to the electromagnetic coil. | 12-24-2015 |
| 20160163441 | ACTUATOR DRIVER CIRCUIT - A circuit for driving an actuator including a closing coil and an opening coil, the circuit including a first electrical switch, a second electrical switch, a third electrical switch, a first diode, a second diode, a third diode, and a capacitor electrically connected to a second terminal of the third electrical switch. The circuit is structured such that controlling the state of the first, second, and third transistors causes current flowing through the circuit to flow through one of the closing coil and the opening coil and to not flow through the other of the closing coil and the opening coil. | 06-09-2016 |
| 20180025871 | ELECTROMAGNETIC CONTACTOR PROVIDED WITH MEANS FOR DETECTING THE OPEN OR CLOSED POSITION OF CONTROLLED SWITCHES | 01-25-2018 |
